Has anyone ever modified a 2x12 closed back cab by opening up the back a little...?

meaning to say, have you ever modified a closed back cab with a non-removable back and opened her up? For instance, cutting a small width of say 2 - 3" the length of the cab to make it a very slightly partially open-back, but still retain some of the closed back qualities?

I had a cb Guytron cab and rather then butcher it I decided to sell it unloaded and use the funds to buy a Avatar OB cab. Regarding the sound difference, I am much happier to have this sound as I was always fighting the excess and boomy bass with the cb cabinet.

Not a 2x12" but i made my Marshall 1960A 4x12" cab open back (the same way the JTM45/100 RI stack slant cab is). I made new back panels so that 1/3 of it is open. Much better to me, i prefer the slightly wider sound than the closed back bass boost.

Yup, I have an old '63 blond Fender 2x12. I stored the original panel and had two new back panels made....left about a 4 inch gap between them. It worked out great, and the sound is very punchy with great bass...and a little airy-ness. THD used to make (maybe they still do?) a cab that had the same thing. I think they called it a rear "port" but it was basically a 3 inch wide slit running the length of the back, side to side.

meaning to say, have you ever modified a closed back cab with a non-removable back and opened her up? For instance, cutting a small width of say 2 - 3" the length of the cab to make it a very slightly partially open-back, but still retain some of the closed back qualities?

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Yep-more than once! I recently bought a LOPO large closed back 2x12 thing the bass would better than a smaller 2x12 closed cab. Well the cab sounded good but lacked a lot of low end especially at lower to medium volumes.

The back panel of the cab is 20 inches in hieght. I cut 5 inches off the bottom so its 1/4 open on the bottom. WOW! what a difference! The cab sounds bigger fuller and has a lot more low end!

I'd say it doesnt retain a lot of the closed back qualities but it still projects just fine. All I can say is no more closed back x12's for me! Bob